161034402506 has 16 divisors (see below), whose sum is σ = 241785005280. Its totient is φ = 80439434640.

The previous prime is 161034402491. The next prime is 161034402533. The reversal of 161034402506 is 605204430161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16210361 + ... + 16220291.

It is an arithmetic number, because the mean of its divisors is an integer number (15111562830).

Almost surely, 2^161034402506 is an apocalyptic number.

161034402506 is a deficient number, since it is larger than the sum of its proper divisors (80750602774).

161034402506 is a wasteful number, since it uses less digits than its factorization.

161034402506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16949.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 161034402506 its reverse (605204430161), we get a palindrome (766238832667).

The spelling of 161034402506 in words is "one hundred sixty-one billion, thirty-four million, four hundred two thousand, five hundred six".